Crossword Genius

One mistreats Jack and his employer? (6)

Ross

I believe the answer is:

abuser

'one mistreats' is the definition.

'jack and his employer?' is the wordplay.
'jack' becomes 'ab'.
'and' is a charade indicator (letters next to each other).
'his employer?' becomes 'user'.
'ab'+'user'='ABUSER'

(Other definitions for abuser that I've seen before include "He takes undue advantage" , "One who reviles or a misuser of drugs" , "Bully" , "one who uses bad language" , "Person who over-indulges in, say, drugs or drink" .)

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